{
  "manageEntity": {
    "action": "Save",
    "entityId": "736261808",
    "entityType": "Track",
    "nonce": "0xd773879dd8fb21b15cf4ffe1394e2b755f9d5c69eda26ba469a8fe92c7a1e959",
    "signature": "0x47f5245b7585246967e5391d1a87768c5970bde63b64069dd6fb1e5a68dd294a20438f8e261905f4d2cea5ab9c3e63f5e00111a788a392e9b5a60deb8506096f1c",
    "signer": "0xD7c3dC9EEf2D94568C0e1A9C88b58696850c7C22",
    "userId": "125737"
  }
}